Question
Mercalli scale and Richter scale.

Answer

Mercalli scaleRichter scale
(i) It measures the intensity of earthquake.(i) It measures the energy released during an earthquake.
(ii) The measurement is based on observed effects.(ii) The measurement is done with the help of seismograph.
(iii) Quantified from observation of the effects on earth’s surface, human beings, objects and man- made structures.(iii) Quantified from logarithmic scale obtained by calculating logarithm of the amplitude of waves.
(iv) Unit of measurement I (not felt) to XII (total destruction)(iv) Unit of measurement from <2.0 to 10.0 + (never recorded) 3.0 earthquake releases 32 times more energy than a 2.0 earthquake.

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